Non-Closure Properties Of Multi-Inkdot Nondeterministic Turing Machines With Sublogarithmic Space

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES（2020）

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摘要

This paper investigates the closure properties of multi-inkdot nondeterministic Turing machines with sublogarithmic space. We show that the class of sets accepted by the Turing machines is not closed under concatenation with regular set, Kleene closure, length-preserving homomorphism, and intersection.

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关键词

closure property, multi-inkdot Turing machines, nondeterministic Turing machines, sublogarithmic space complexity

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